Cell Resp. Flashcards
What is the primary purpose of cellular respiration?
To convert biochemical energy from nutrients into adenosine triphosphate (ATP).
Which organelle is known as the powerhouse of the cell?
Mitochondria.
True or False: Glycolysis occurs in the mitochondria.
False.
Fill in the blank: The three main stages of cellular respiration are glycolysis, the citric acid cycle, and __________.
oxidative phosphorylation.
What is the end product of glycolysis?
Pyruvate.
Which molecule acts as the final electron acceptor in the electron transport chain?
Oxygen.
What is the net gain of ATP molecules from one molecule of glucose during glycolysis?
2 ATP.
Which process occurs in the absence of oxygen and results in the production of lactic acid or ethanol?
Fermentation.
True or False: The citric acid cycle occurs in the cytoplasm.
False.
What is produced during the citric acid cycle in addition to ATP?
NADH and FADH2.
Multiple Choice: Which of the following is NOT a product of the citric acid cycle? A) CO2 B) ATP C) O2 D) NADH
C) O2.
What is the role of NAD+ in cellular respiration?
It acts as an electron carrier.
Fill in the blank: During oxidative phosphorylation, ATP is produced through a process called __________.
chemiosmosis.
How many ATP molecules can be produced from one molecule of glucose during aerobic respiration?
Up to 38 ATP.
True or False: The electron transport chain is located in the inner mitochondrial membrane.
True.
What is the main purpose of the citric acid cycle?
To generate electron carriers for the electron transport chain.
Multiple Choice: Which of the following processes occurs in the mitochondria? A) Glycolysis B) Fermentation C) Citric acid cycle D) None of the above
C) Citric acid cycle.
What happens to pyruvate before entering the citric acid cycle?
It is converted into acetyl-CoA.
Fill in the blank: The process of converting ADP to ATP is called __________.
phosphorylation.
True or False: ATP is a stable molecule that can be stored for long periods in the cell.
False.
What is the role of FADH2 in cellular respiration?
It donates electrons to the electron transport chain.
Multiple Choice: Which of the following is a byproduct of cellular respiration? A) Glucose B) Oxygen C) Carbon dioxide D) Lactic acid
C) Carbon dioxide.
What is the difference between aerobic and anaerobic respiration?
Aerobic respiration requires oxygen, while anaerobic respiration does not.
Fill in the blank: The enzyme ATP synthase is responsible for synthesizing ATP during __________.
oxidative phosphorylation.
True or False: The energy yield of anaerobic respiration is greater than that of aerobic respiration.
False.
What is the main function of the electron transport chain?
To create a proton gradient for ATP production.
